AirHint found the following cheapest return flights from New Haven (HVN) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 12 Dec - 15 Dec | Avelo Airlines | ||
| 17 Dec - 24 Dec | Avelo Airlines | ||
| 23 Dec - 29 Dec | Avelo Airlines | ||
| 25 Dec - 31 Dec | Avelo Airlines | ||
| 22 Dec - 30 Dec | Avelo Airlines | ||
| 21 Dec - 29 Dec | Avelo Airlines |
Also check the deals for one-way flights from New Haven to San Juan in December.
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